This means that 2 24 (= 16.777.216) unique OUAs can be assigned per OUI.

Bit 25-48 (network adapter identifier): Bits 25 to 48 provide device manufacturers with 24 bits for assigning a unique hardware identifier (organisationally unique address, OUA).

A corresponding service is available, for example, on.

The assignment of OUIs is usually public and can be determined via databases.

Bit 3–24 (manufacturer identification): Bits 3 to 24 encode an identifier (organizationally unique identifier, OUI), which is assigned exclusively to hardware manufacturers by IEEE.

Addresses that are only locally unique are called locally administered address (LAA) and are marked with U/L = 1.

The most straightforward way to do it is by using the Device manager. There are situations when you might need to change your MAC address.If you followed this tutorial and changed the network address of your adapter, you also need to know how to restore it to the default value. Your device therefore is likely to have two MAC addresses. Note: You do not need to click on anything on the Start screen - typing will automatically initiate a program search. Type cmd and press Enter to launch the command prompt. Press the Windows Start key to open the Start screen. The address is assigned by the manufacturer, for Ethernet and Wi-Fi cards. What is your device Windows Computer Windows Computers How to find the IP number and MAC address of a network card. If U/L = 0, the address is valid worldwide as a universally administered address (UAA). Restoring MAC address in Windows 11 and Windows 10 using Device Manager. A Media Access Control (MAC) address is a unique numeric identifier used to distinguish a device from others on a network. Bit 2 (registry): The second bit of the MAC address indicates whether it is an address with global validity (universal) or whether the address has been assigned locally (local).Multicast addresses are identified by I/G = 1 and are addressed to several receivers. If I/G = 0, it is a unicast address for a single network adapter. This bit is called I/G (short for individual/group). Bit 1 (receiver): The first bit of the MAC address specifies whether it is an individual or group address.The bit sequence of each MAC address is divided into 4 areas, each of which encodes different information.

How to know mac address of laptop